Ross ROSS = Recommend OSS · open-source software intelligence for agents

kevin-montrose/Jil

Fast .NET JSON (De)Serializer, Built On Sigil observed · 2026-08-28

github.com/kevin-montrose/Jil · C# · MIT (permissive) observed · 2026-08-28

Health v2 · maintenance only

32/100

  • Activity 0
  • Release rhythm 35
  • Longevity 100

Flags: no_releases

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.

  • gap_med: n/a
  • age_days: 4727
  • days_rel: n/a
  • days_push: 868
  • n_releases_24m: 0

Full methodology

Adoption not part of the score

2140 stars · 249 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Jil is a fast JSON serializer and deserializer for .NET, built on Sigil to emit highly optimized code at runtime. It supports both static typed and dynamic (DLR-based) serialization and deserialization.

Use cases

  • serialize c# objects to fast
  • deserialize into typed .NET classes
  • high performance parsing in asp.net
  • serialize dynamic or expandoobject types to
  • reduce serialization overhead in hot paths

When to choose

  • you need maximum JSON throughput in .NET and can tolerate warm-up cost
  • you want a lightweight serializer without heavy dependencies
  • you need dynamic JSON handling with DLR support

When to avoid

  • you need case-insensitive deserialization by default
  • you want a batteries-included serializer with rich attribute-based customization
  • you need actively developed features rather than maintenance

Facets

library · maturity maintenance

serialization developer-tools backend apis dotnet cross-platform -serializer sigil performance csharp

1 source

Member repositories

RepositoryRoleHealth v2
kevin-montrose/Jilmain32

For agents

markdown · JSON · MCP: product_card(name="kevin-montrose/Jil")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem